Portable lamp



FIG. 1 is a rear perspective view of a portable lamp in accordance with the new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a side view thereof;

FIG. 8 is a open side view thereof; and,

FIG. 9 is a rear perspective view with the handle up. 

The ornamental design for a portable lamp, as shown and described. 